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inysia [295]
4 years ago
12

Which one of the following statements is not true?

Chemistry
1 answer:
lana66690 [7]4 years ago
3 0

Answer:

When magma reaches the surface, its dissolved gas content increases is true

<u>Explanation</u>:

The volcanic eruptions happen because of magma that is expelled on the earth’s surface. At the earth’s depth, all magma have gas dissolved in liquid. When the pressure has decreased the magma rises towards the earth’s surface creating a separate vapour phase.  

As pressure reduces the volume of gas will  expands and giving magma its 'explosive character'. Thus, as magma reaches the surface the dissolved gas content decreases and magma comes out of earth’s surface.

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7 0
3 years ago
An atom of which element in the ground state contains electrons in the fourth principal energy level?
krok68 [10]
Kr 
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6 0
3 years ago
A pure substance composed of two or more different elements is aln)
kenny6666 [7]

Answer:

c

Explanation:

that is my dads answer

8 0
3 years ago
1. Which form of sanitation do health experts prefer, washing hands with soap and water or
geniusboy [140]

Answer:

Washing hands with soap and water. Sanitizers are only used if there is no soap and water.

5 0
3 years ago
A sample of a compound contains 60.0 g C and 5.05 g H. It’s molar mass is 78.12 g/mol. What is the compound’s molecular formula?
Natalka [10]

Answer:

C6H6

Explanation:

C :     60.0 g*1 mol/12 .01g = 5.00 mol

H:      5.05 g * 1 mol/1.01 g= 5.10 mol

C:H = 5.00 mol : 5.10 mol = 1:1

CH is an empirical formula

Molar mass (12.01 +1.01)=13.02 g/mol

78.12g/mol /13.02 g/mol =6

Molecular formula is the empirical that was taken 6 times (CH)6 = C6H6

5 0
4 years ago
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